1993 SSEi, Sluggish Acceration, 20* of Knock - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-12-2006, 08:21 PM   #1
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Default 1993 SSEi, Sluggish Acceration, 20* of Knock

Heres the data from the scan tool..any ideas?

My first plan of attack is to put the 2.53 pulley back on.

The replacement manifold helped a lot with the smoothness and it feels a bit faster however it is still pulling mad KR.



thoughts?

I'm also going to disconnect the PCM for a while then put the old pulley back on. Could this KR be from a possibly bad PCM? we know its not exhaust leak related.

The car has a hard time starting every time if I have been running it hard, it requires I punch the gas a few times, it also blows a lot of smoke (rich exhaust smoke)....would this be a sign of a failed FPR? its odd how my fuel pressure was in range at idle and WOT.

At 3700 feet and a relitive altitue of 5000ft today with the temps (called local 18th mile track) is it possible to have no KR with a smaller pulley in these temps?

The engine temp was right around 195 btw. going up a slight hill but fairly flat.
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Old 08-12-2006, 11:37 PM   #2
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I'm looking at what happens between frames 4 and 5. You shift, MAF count goes down, KR spikes instantly... all the while, you are getting leaner and leaner (decreasing O2 voltage). How'* your fuel pump?
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Old 08-13-2006, 12:02 AM   #3
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Or maybe it'* getting richer and richer... now I can't remember. I do know I can blow some smoke too. My scan tool tells me it is compensating for a lean condition by adding more fuel. Have you checked out the rear manifold?
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